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(12) Patent Application: | (11) CA 2398986 |
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(54) English Title: | PROCESS FOR PREPARING MELAMINE FROM UREA |
(54) French Title: | PROCEDE DE PREPARATION DE MELAMINE A PARTIR D'UREE |
Status: | Deemed Abandoned and Beyond the Period of Reinstatement - Pending Response to Notice of Disregarded Communication |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | SMART & BIGGAR LP |
(74) Associate agent: | |
(45) Issued: | |
(86) PCT Filing Date: | 2001-01-23 |
(87) Open to Public Inspection: | 2001-08-09 |
Examination requested: | 2006-01-20 |
Availability of licence: | N/A |
Dedicated to the Public: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | Yes |
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(86) PCT Filing Number: | PCT/NL2001/000046 |
(87) International Publication Number: | NL2001000046 |
(85) National Entry: | 2002-08-01 |
(30) Application Priority Data: | ||||||
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Process for preparing melamine from urea at elevated temperature and in the
presence of a catalyst, in which a gaseous product stream is obtained which is
contacted with a liquid coolant in a cooling zone and in which a proportion of
the concentrated aqueous carbamate solution from the absorption zone is
returned to the cooling zone.
La présente invention concerne un procédé de préparation de mélamine à partir d'urée, à une température élevée et en présence d'un catalyseur. Selon ce procédé, un flux de produit gazeux obtenu est mis en contact avec un liquide de refroidissement, dans une zone de refroidissement, et une partie de la solution de carbamate aqueuse concentrée, issue de la zone d'absorption, est de nouveau conduite à la zone de refroidissement.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
Sorry, the representative drawing for patent document number 2398986 was not found.
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Description | Date |
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Time Limit for Reversal Expired | 2011-01-24 |
Application Not Reinstated by Deadline | 2011-01-24 |
Deemed Abandoned - Conditions for Grant Determined Not Compliant | 2010-03-04 |
Deemed Abandoned - Failure to Respond to Maintenance Fee Notice | 2010-01-25 |
Notice of Allowance is Issued | 2009-09-04 |
Letter Sent | 2009-09-04 |
4 | 2009-09-04 |
Notice of Allowance is Issued | 2009-09-04 |
Inactive: Approved for allowance (AFA) | 2009-08-27 |
Amendment Received - Voluntary Amendment | 2009-03-17 |
Inactive: S.30(2) Rules - Examiner requisition | 2008-09-17 |
Inactive: Cover page published | 2008-08-08 |
Inactive: Acknowledgment of s.8 Act correction | 2008-07-30 |
Inactive: S.8 Act correction requested | 2007-05-16 |
Letter Sent | 2006-02-07 |
Request for Examination Requirements Determined Compliant | 2006-01-20 |
Request for Examination Received | 2006-01-20 |
All Requirements for Examination Determined Compliant | 2006-01-20 |
Letter Sent | 2003-12-03 |
Letter Sent | 2003-12-03 |
Letter Sent | 2003-12-03 |
Letter Sent | 2002-11-14 |
Inactive: Correspondence - Transfer | 2002-11-05 |
Inactive: Cover page published | 2002-10-30 |
Inactive: Courtesy letter - Evidence | 2002-10-29 |
Inactive: Notice - National entry - No RFE | 2002-10-28 |
Inactive: First IPC assigned | 2002-10-28 |
Application Received - PCT | 2002-09-27 |
Inactive: Single transfer | 2002-09-17 |
National Entry Requirements Determined Compliant | 2002-08-01 |
Application Published (Open to Public Inspection) | 2001-08-09 |
Abandonment Date | Reason | Reinstatement Date |
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2010-03-04 | ||
2010-01-25 |
The last payment was received on 2009-01-02
Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following
Patent fees are adjusted on the 1st of January every year. The amounts above are the current amounts if received by December 31 of the current year.
Please refer to the CIPO
Patent Fees
web page to see all current fee amounts.
Fee Type | Anniversary Year | Due Date | Paid Date |
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Basic national fee - standard | 2002-08-01 | ||
Registration of a document | 2002-09-17 | ||
MF (application, 2nd anniv.) - standard | 02 | 2003-01-23 | 2003-01-03 |
Registration of a document | 2003-11-10 | ||
MF (application, 3rd anniv.) - standard | 03 | 2004-01-23 | 2004-01-05 |
MF (application, 4th anniv.) - standard | 04 | 2005-01-24 | 2005-01-24 |
MF (application, 5th anniv.) - standard | 05 | 2006-01-23 | 2006-01-03 |
Request for examination - standard | 2006-01-20 | ||
MF (application, 6th anniv.) - standard | 06 | 2007-01-23 | 2007-01-03 |
2007-05-16 | |||
MF (application, 7th anniv.) - standard | 07 | 2008-01-23 | 2008-01-03 |
MF (application, 8th anniv.) - standard | 08 | 2009-01-23 | 2009-01-02 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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DSM IP ASSETS B.V. |
Past Owners on Record |
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NORA ANNA DE WIT |
ROB KASIMIER GULPERS |